Abstract: A catheter pump system with a pump having a fluid displacement member in the blood flow channel, a motor and a motor controller having a pressure sensing port for connection to a control pressure source. The motor controller is arranged for causing motor speed to be increased in response to a reduction of pressure applied to the pressure sensing port and for causing motor speed to be reduced in response to an increase of pressure applied to the pressure sensing port. The motor may be a pneumatic motor for driving the pump and the motor controller may be arranged for controlling motor speed by reducing flow through a supply channel to the motor and allowing an increase of flow through the supply channel to the motor in response to control signals received via an input interface.

Abstract: A pressure actuated single-lumen blood pumping device has a housing (4) having a wall (19) bounding a pressure transfer chamber (11; 411). The housing (4) bounds a pressure transfer port (9) for connection to a pressure source, the pressure transfer port (9) communicating with the pressure transfer chamber (11; 411) for alternatingly transferring over pressure and under pressure from the pressure source to the pressure transfer chamber (11; 411). A flexible tubular membrane (2; 102; 202; 302; 402) is arranged in the pressure transfer chamber (11; 411). A blood transfer conduit (3; 103; 203; 303; 403) passes through the wall (19) bounding the pressure transfer chamber (11; 411) and the blood transfer conduit (3; 103; 203; 303; 403) connects to opposite ends (5, 6; 105; 405, 406) of the flexible tubular membrane (2; 102; 202; 302; 402).

Abstract: A pressure actuated single-lumen blood pumping device has a housing (4) having a wall (19) bounding a pressure transfer chamber (11; 411). The housing (4) bounds a pressure transfer port (9) for connection to a pressure source, the pressure transfer port (9) communicating with the pressure transfer chamber (11; 411) for alternatingly transferring over pressure and under pressure from the pressure source to the pressure transfer chamber (11; 411). A flexible tubular membrane (2; 102; 202; 302; 402) is arranged in the pressure transfer chamber (11; 411). A blood transfer conduit (3; 103; 203; 303; 403) passes through the wall (19) bounding the pressure transfer chamber (11; 411) and the blood transfer conduit (3; 103; 203; 303; 403) connects to opposite ends (5, 6; 105; 405, 406) of the flexible tubular membrane (2; 102; 202; 302; 402).

Abstract: A catheter pump includes a catheter channel communicating with a distal end portion of the catheter for alternatingly leading fluid in proximal and distal directions. At least one outlet passage is distally spaced from the inlet passage or passages. The catheter pump further includes a displacement structure communicating with the proximal end portion of the catheter for alternatingly applying suction and pressure for driving the fluid displacement. At least in operating condition, the inlet passage or passages are continuously open. A catheter and fittings for such a catheter pump and method of using a catheter pump are also described.

Abstract: A catheter pump includes a catheter channel communicating with a distal end portion of the catheter for alternatingly leading fluid in proximal and distal directions. At least one outlet passage is distally spaced from the inlet passage or passages. The catheter pump further includes a displacement structure communicating with the proximal end portion of the catheter for alternatingly applying suction and pressure for driving the fluid displacement. At least in operating condition, the inlet passage or passages are continuously open. A catheter and fittings for such a catheter pump and method of using a catheter pump are also described.

Abstract: A catheter pump includes a catheter channel communicating with a distal end portion of the catheter for alternatingly leading fluid in proximal and distal directions. At least one outlet passage is distally spaced from the inlet passage or passages. The catheter pump further includes a displacement structure communicating with the proximal end portion of the catheter for alternatingly applying suction and pressure for driving the fluid displacement. At least in operating condition, the inlet passage or passages are continuously open. A catheter and fittings for such a catheter pump and method of using a catheter pump are also described.